<template>
  <div class="upload-file">
    <el-upload
      multiple
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="false"
      :headers="headers"
      class="upload-file-uploader"
      ref="fileUpload"
    >
      <!-- 上传按钮 -->
      <el-button
        size="mini"
        type="primary"
        v-if="(type == 'suggest' && !disabled) || type == 'jylzActivity'"
        :disabled="disabled"
        >选取文件</el-button
      >
      <!-- 上传提示 -->
      <div
        class="el-upload__tip"
        slot="tip"
        v-if="(type == 'suggest' && !disabled) || type == 'jylzActivity'"
      >
        请上传
        <template v-if="fileSize">
          大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
        </template>
        <template v-if="fileType">
          格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
        </template>
        的文件
      </div>
    </el-upload>

    <!-- 文件列表 -->
    <transition-group
      class="upload-file-list el-upload-list el-upload-list--text"
      name="el-fade-in-linear"
      tag="ul"
      v-if="type != 'suggest'"
    >
      <li
        :key="file.url"
        class="el-upload-list__item ele-upload-list__item-content"
        v-for="(file, index) in fileList"
      >
        <a @click="downloadFile(file.url, getFileName(file.name))">
          <span class="el-icon-document"> {{ getFileName(file.name) }} </span>
        </a>
        <div class="ele-upload-list__item-content-action">
          <el-link
            :underline="false"
            @click="handleDelete(index)"
            type="danger"
            v-if="!disabled"
            >删除</el-link
          >
        </div>
      </li>
    </transition-group>
    <div style="margin-top: 10px" v-else>
      <table class="namebutt-table">
        <thead>
          <tr>
            <th>文件名</th>
            <th>大小</th>
            <th>状态</th>
            <th v-if="!disabled">操作</th>
          </tr>
        </thead>
        <tbody id="tableList">
          <tr v-for="(file, index) in fileList" :key="file.url">
            <td>{{ file.name }}</td>
            <td>{{ (file.size / 1024).toFixed(2) }}KB</td>
            <td>上传成功</td>
            <td v-if="!disabled">
              <el-button
                size="mini"
                type="danger"
                @click="handleDelete(file, index)"
                style="padding: 4px 6px"
                >删除</el-button
              >
            </td>
          </tr>
        </tbody>
      </table>
    </div>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import { listByIds, delOss } from "@/api/system/oss";
import { delFileManager } from "@/api/suggest/index";
export default {
  name: "FileUpload",
  props: {
    // 值
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      default: 5,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["doc", "xls", "ppt", "txt", "pdf", "jpg"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
    type: [String],
    uploadUrl: {
      type: String,
      default: process.env.VUE_APP_BASE_API + "/system/oss/upload",
    },
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadFileUrl: this.uploadUrl, // 上传文件服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
    };
  },

  watch: {
    value: {
      async handler(val) {
        if (val) {
          let temp = 1;
          // 首先将值转为数组
          let list;
          if (Array.isArray(val)) {
            list = val;
          } else {
            list = [val];
          }
          // 然后将数组转为对象数组

          if (this.type == "suggest") {
            this.fileList = list.map((item) => {
              item.name = item.fileName;
              item.url = item.relativePath;
              item.uid = item.uid || new Date().getTime() + temp++;
              return item;
            });
          } else {
            this.fileList = list.map((item) => {
              item = { name: item, url: item, ossId: item.ossId };
              item.uid = item.uid || new Date().getTime() + temp++;
              return item;
            });
          }
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // 校检文件类型
      if (this.fileType) {
        const fileName = file.name.split(".");
        const fileExt = fileName[fileName.length - 1];
        const isTypeOk = this.fileType.indexOf(fileExt) >= 0;
        if (!isTypeOk) {
          this.$modal.msgError(
            `文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`
          );
          return false;
        }
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传文件，请稍候...");
      this.number++;
      return true;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError(err) {
      this.$modal.msgError("上传文件失败，请重试");
      this.$modal.closeLoading();
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.uploadList.push({
          name: file.name,
          url: res.data.avatar,
          ossId: file.uid,
          size: Number(file.size),
          fileName: file.name,
          relativePath: res.data.avatar,
        });

        if (this.type == "jylzActivity") {
          this.$emit("getActivityUrl", res.data.avatar);
        } else if (this.type == "suggest") {
          this.$emit("getSuggestFile", this.uploadList);
        }
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.fileUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除文件
    handleDelete(file, index) {
      this.fileList.splice(index, 1);
      if (this.type == "jylzActivity") {
        this.$emit("getActivityUrl", null);
      } else if (this.type == "suggest") {
        if (file.fileId) delFileManager(file.fileId);
        this.$emit("getSuggestFile", this.fileList);
      }
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        // this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 获取文件名称
    getFileName(name) {
      // 如果是url那么取最后的名字 如果不是直接返回
      if (name.lastIndexOf("/") > -1) {
        if (name.slice(name.lastIndexOf("/") + 1).lastIndexOf("_") > -1) {
          let url = name.slice(name.lastIndexOf("/") + 1);
          return (
            url.slice(0, url.lastIndexOf("_")) + url.slice(url.lastIndexOf("."))
          );
        } else {
          return name.slice(name.lastIndexOf("/") + 1);
        }
      } else {
        return name;
      }
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        strs += list[i].ossId + separator;
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
    downloadFile(url, fileName) {
      let link = document.createElement("a");
      link.style.display = "none";
      link.target = "_blank";
      link.href = "http://36.139.241.126:8082" + url;
      document.body.appendChild(link);
      link.click();
    },
  },
};
</script>

<style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
.namebutt-table {
  width: 100%;
}
.namebutt-table th {
  border-width: 1px;
  border-style: solid;
  border-color: #dcd8d8;
}
.namebutt-table td {
  text-align: center;
}
.namebutt-table tbody tr:hover,
.namebutt-table thead tr {
  background-color: #f2f2f2 !important;
}
.tables tr {
  height: 50px;
  border: 1px solid #bbb;
}
.tables {
  width: 100%;
  font-size: 16px;
  color: #666;

  border-collapse: collapse;
}

.tables td {
  border-bottom: 1px solid #bbb;
  border-right: 1px solid #bbb;
}
</style>
